Sewing – Elements – Thread cutting – severing or breaking
Patent
1990-10-02
1991-08-27
Nerbun, Peter
Sewing
Elements
Thread cutting, severing or breaking
112254, 112300, 1122621, D05B 4704, D05B 6502
Patent
active
050424084
ABSTRACT:
A sewing machine provided with a thread cutting mechanism and a needle thread tension release mechanism. Normally, the needle thread is subjected to a proper tension by a thread tension regulating mechanism. However, at an initial start-up period of the sewing operation, the needle thread tension is released by the tension release mechanism for a first predetermined period during which a needle thread loop is trapped by a loop taker. Further, the sewing machine is provided with a thread holding member for holding a leading end portion of the needle thread. The holding member is movable to its thread release position after elapse of a second predetermined period at the initial start-up period of the sewing operation. The first predetermined period is within the second predetermined period.
REFERENCES:
patent: 3728978 (1973-04-01), Honda et al.
patent: 3747548 (1973-07-01), Brophy et al.
patent: 4098208 (1978-07-01), Hedegaard
patent: 4202286 (1980-05-01), Costas
patent: 4793273 (1988-12-01), Hara et al.
patent: 4892048 (1990-01-01), Karuga et al.
patent: 4967679 (1990-11-01), Hara et al.
Ito Kazuhisa
Suzuki Hajime
Brother Kogyo Kabushiki Kaisha
Nerbun Peter
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